Embracing Marketing Mistakes
EP 112: Author of Decoded Explains Why This T‑Mobile Ad Failed in One Sec
26 May 2026
Chapter 1: What T-Mobile campaign failure changed Phil Barden's career?
today's episode kicks off differently instead of easing in with career highlights our guest behavioral science expert and author phil barden opened straight with a t-mobile campaign disaster that changed the entire course of his career and instead of hiding that away at the bottom of the show like some guests do everybody wants to share a mistake but use it at the end phil brings it right to the beginning
I feel like I'm in a confessional and it's good to be rid of this. It's the same space. No one can hear you, Phil.
Okay, all right.
There's no one listening, just you two. So this week's show is how you can get more out of behavioral science, neuroscience, and use it in your day-to-day for your marketing. We're not telling you whether the ad is good or bad. We will just tell you how the brain will process that. Phil is brilliant, and I think I'm going to have to get him on for a second episode.
And he's convinced me to buy his book, Decode. So if you like neuroscience and you want to learn how to use behavioral science to make better marketing campaigns, this episode is for you. Enjoy. Thank you. Phil Harden, welcome to the show. This is very unusual. Most people that come on the show want us to do the mistake after they've talked about how brilliant they are in their careers.
And you've sort of said, actually, I want to start with my mistake at T-Mobile. So T-Mobile, well, that takes me back, having a T-Mobile phone. Is that the days of Nokia? When did T-Mobile stop being T-Mobile as well? Oh, goodness. It was 2010 or a bit later. They merged with Orange in the UK. So it was joint venture between Deutsche Telekom and France Telekom.
And then that all got subsumed into EE, which has carried on ever since. Right, that's where they are, EE, because everybody wanted to be on Orange. I remember Orange was quite a cool network back in the day. That was the days when you had to pay for your text messages, wasn't it?
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Chapter 2: How does behavioral science apply to marketing strategies?
Indeed. They did Orange Tuesdays, wasn't it, with free cinema tickets? Oh, yeah.
Well, very good. Orange Tuesdays. I'm sure there's a T-Mobile arena somewhere, isn't there? There is in Germany because they're the sponsors of Bayern Munich. Ah, yeah, there you go. That's what I know from probably when they knocked Liverpool out of the cup.
We're delaying. Let's hear the mistake. Yeah, true.
I feel like I'm in a confessional and it's good to be rid of this.
No one can hear you, Phil.
There's no one listening, just you two. Yeah, so I was VP for the brand in Europe. and charged with relaunching the brand around Europe. And we'd come up with a very interesting proposition. You were talking just a minute ago about back in the days when you had texts and minutes and people bought tariffs based on fixed bundles of a number of minutes and a number of texts.
People got mightily fed up if they had, for example, used up all their minutes but had loads of text remaining as almost like credit. But then they got charged a lot of money for making voice calls and vice versa. So that insight led us to create a flexible tariff called, ironically, Flexed. And what Flexed did was basically bundle the minutes and text together.
And so it didn't matter which you used. You could deplete text and then use your minutes or deplete minutes and use text. So it was lovely. It was really flexible. And to communicate this, we briefed the agency to come up with a creative idea, which they did, which was lovely, which was about things that are rock solid and rigid now flex.
So things that you had thought previously were inflexible are now flexible. And we did quite a few different ads, and one of them had a guy leaning on a brick wall. and gazing over a park. And the brick wall was flexing under his weight, under his arms. And, you know, there was a bit of text about the proposition. And this had just really bombed.
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Chapter 3: What is the significance of category entry points in marketing?
We cut that bit and we had him then going out of a ground floor window, so would land safely, but still we got the little indentation on the pavement as his feet touched the ground.
Yeah, it sounds like the ad agency could do with a couple of behavioural scientists on their staff for the sounds of it. Those two executions.
Yeah, and what it really brought home to me, this thing that when you are sitting in a creative presentation, more often than not, the agencies say, use phrases such as, consumers will think that blah, blah, blah, or the takeout will be blah, blah, blah. And how do you know that? That's just you trying to sell something a piece of creative.
You don't know that's what the prototypical objective, impartial, not really bothered view of Joe Public is going to be. That's why it's crucial to take a very neutral stance on this, which is what these guys did in Germany. They said, we're agnostic. We're not telling you whether the ad is good or bad. We will just tell you how the brain will process that. What are the meanings?
Because the brain's constantly predicting things and trying to recode stimuli into meaning. So, you know, man standing behind a wall on his own, divorced from a group of friends, a group of people having a good time. What does that typically mean? That's the level that you need to approach this at. This is a message from the show's sponsors, Prohibition PR.
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Chapter 4: How do first impressions affect consumer perception?
So he's still a great proponent. And then other people have come into the field. I remember going to meet Richard Shotton when he was still agency side and presenting stuff to him. And Richard, you know, along the way had a road to Damascus moment like me and quit and set up on his own and, you know, has now written three books. Fantastic. He's been a guest on the show as well.
We've probably had six or seven behavioural scientists. It's a really interesting... Because everybody's got a slightly different take on it. And when we and Will talk to people, I mean, we haven't actually had Rory on yet, but he's a target. If he's out there, we hope to get him on soon. But what gets me is everybody's got a slightly different take. There's all these different types of bias.
You listen to everybody's key tips on how to get more out of behavioral science. but actually sometimes they work against each other as well. You know? So for instance, I spoke to someone recently called Nancy Hart. I don't know if you know her, but Jen, she was, we were talking about the, the bias of where, you know, social proof where you walk past a restaurant, it's full.
And she gave an example of where she'd walked past one and she went in the one that was full and it turned out the one that was recommended was filler was fuller later. So she'd, she'd used social proof the wrong way around. And, but there's, Like, there's so many different, like, you could go completely AI on it and go, right, AI and behavioral science the hell out of my campaign.
Here's my campaign. Now do me a million different variations. And then you would test it, right? Is that the 2026 way to go about marketing now? Is that what we should all be doing?
Yeah.
I don't see why not. I mean, to be honest, the stuff that's in the LLMs, I think will replace a lot of consultancies now because that knowledge is no longer resident in one person who does the desk research and gathers all the studies. You can go and ask Chad or Claude or whoever to summarize it and not only summarize it, but give you the recommendations. What are the pluses and minuses?
How would you apply it to the following problem? And it does a pretty decent job. So that will revolutionize a lot of places and workflows that hitherto existed. So I think the place where it will still exist is where people have got something that is not replicable. So, for example, they've got quant research approaches that AI simply can't do.
So that still gives an angle for individual agencies and consultancies. Brilliant. And you've written a book, right? Do you want to tell us a bit about your book? Because I think that with books, we've had a few authors on the show too, and it's such an undertaking. So well done to write a book, but how did you go about tackling it?
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Chapter 5: What mistakes did Phil Barden learn from the T-Mobile ad?
I'm humbled by those sort of words. But that was the purpose, really.
to translate it's amazing you got mark to write a sentence without swearing in it oh i had to edit it a lot he's brilliant mark so it'd be good to dive into some of the um some of the kind of the key lessons of the book particularly the kind of the value that marketers listening to this can take away and chris and i have kind of pulled out a few areas that really kind of grabbed us now the first is
was around category entry points and about the need for brands to become the first choice in the brain. Do you want to start by kind of explaining what a category entry point is in the world of marketing and then dive into some of those biases, I suppose, that can help influence the brand in that context?
Sure. Well, I think category entry points and the phrase that sits alongside them, which is mental availability, have both been made hugely popular thanks to the work of Professor Byron Sharp and the Aaron Bass Institute. Byron's book, How Brands Grow, How Brands Grow Too, as well. So basically, and this is, it's fabulous because it is,
helps our understanding that human decision-making is always a product of the person and the situation that they're in. So context is key. And if you think about your own, your own behavior, now, I don't, don't know, look at you guys, whether or not you enjoy the occasional alcoholic beverage, but you know, on the basis that you possibly might think about your choice of alcoholic beverage and
When you're on holiday versus when you're at home, when you're in a business meeting, whether it's a business lunch or a casual lunch, whether you're with friends, clients, colleagues, what the weather's like, whether you're indoors, outdoors, whatever it is, all of those are contextual factors. And you only need change one and it changes your choice. It changes your decision.
You are the one constant within that, which is why, incidentally, person based segmentation is, in my view, utterly useless because the same person behaves dynamically. We all do. But that's because context changes. So what?
Category entry points do and help us understand is that contextual bit, because it's about, you know, the what, when, where, why, who we're with, where we are, what we're doing at the same time, etc. So it really forces marketers to look at context as an important factor. The other bit linked with it is it's all about given a certain context, which brands are mentally available.
So which brand in particular comes to mind first as a choice. And that, you know, if you think about ice cream, for example, you want to buy an ice cream on a sunny day in a park for your kids. Certain brands come to mind versus you want to buy an ice cream to slob out on the sofa with your partner watching a movie.
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Chapter 6: How can marketers improve mental availability for their brands?
But only giving the first. Exactly. And getting the audience to complete it. And everybody loved it. And more importantly, everybody knew it. Right. They knew them because we grew up with them. So all of that stuff is exactly the same. And we did we did the study for Weetabix. Look, your distinctive brand assets. Most of it was about packaging because I wanted to relaunch their pack.
But we also included communication assets. And what they found, to their great surprise, was that the line, have you had your, which they ditched seven or 10 years previously, was at the time of the study, the single most distinctive advertising line in the serial category in the UK. So no, absolutely.
So for the agency BBH, this was as the planners, Tom Roach, who said to me, this is like finding a Rembrandt in the attic. In fact, he used that as the title of his IPA award-winning paper on the case study. So they brought back, have you had your Weetabix with the Jack and the Beanstalk campaign? They got three times the ROI on that advertising compared to their previous campaign.
So it's incredibly powerful to do that. And that was exactly why I wrote that post about Silip Bang. You know, he's been off air, I think it's seven years. But everyone will remember that bang and the dirt is gone. And it's really efficient. You can reawaken the neurons. That's the point. You're not having to learn something fresh every time. You're just working with what exists.
It's a bit like, you know, when we you learn a language, you learn to play a musical instrument. You could drop it for a few years and go back to it. You might be a little bit rusty, but you'll pick it up again much quicker than if you'd started to learn something new. Like muscle memory.
Absolutely.
Yeah, yeah. It's exactly the same idea. I'll have to ask Tom about that because I spoke to Tom yesterday and Tom was coming on the show. Oh, brilliant. So actually, he's coming on the show. What's one question I should ask Tom then, do you think? Well, you could ask him about We2B. Ask him whether it was difficult to sell the idea to the client of resurrecting that because, you see, one of the...
One of the issues, particularly with distinctive assets, is that when client personnel change, the new incoming brand manager, marketing director, whoever, wants to make his or her mark. I know I did when I was a brand manager. You want to put your stamp on something. You want to make a name for yourself. And one of the easiest knee-jerk ways to do that is to change stuff.
Let's have a restaging. Let's refresh the packaging. We need a new ad campaign. And what I've learned since is that that's probably, providing your strategy is working, change is the worst thing you could possibly do. And it's a very brave marketeer who says, no, you know what? It ain't broke. Let's not change anything. We just stick at it. It doesn't mean you have to do
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